Oven



July 2s, 1925. 1,547,522

W. E. PATCH OVEN Filed June 2, 1924 2 Sheets-Sheet 1 July 28, 1925.

1,547,522 w. E. PATCH l OVEN Filed June 2, 1924 2 Sheets-Sheet 2 BY M'Patented Julyl 28, 1925. .i

UNITED STATES PATENT oFFlCE.

WILLIAM E. PATCH, F ST. LOUIS, MISSOURI.

OVEN.

Application led .Tune 2, 1924. SerialvNo. 717,296.`

:To all whom `t may concern: i

`ment in Ovens, of which the following 1s av specification, referencebeing had to the accompanying drawings, forming a part thereof.

This invention relates to a certain new and useful improvement inheating ovens.

In United States Letters Patent No. 1,416,- 865, granted to me underdate of May 23, 1922, I disclose a method or process for ef- .fectingunder the action of heat in a closed oven the de-enameling of metalarticles, and my present invention hasfor its chief ob ject theprovisionof an eilicient oven es? pecially adapted, in furtherance of suchprocess or method, for the heat treatment of enameled. ware and articlesfor effecting or accomplishing the de-enameling thereof.

With the above and other objects in view,

my present invention resides in the. novel features of form,construction, arrangement,

and combination of parts hereinafter described and pointed out in theclaims.

In lthe accompanying drawings,

' Figure 1 is a perspective view of a heattreating oven embodying myinvention;

Figure 2 is a vertical sectional view of the oven on approximately theline and looking in the direction of the arrows 2-2, Figure 1; Y

Figure 3 is a'broken plan view, partly in section, of the oven;

Figure 4 is a fragmental rear elevational view of the oven;

Figure 5 is an enlarged vertical sectional view of the oven onapproximately the line and looking in the direction of the arrowsvention, the oven A is preferably in the form of a generally sheet metalrectilinear shell or structure suitably supported on legsA 1 andcomprising a bottom wall ,2, opposite side walls 3--3, a to wall 4, anda rear wall 5, all suitablyrigid y joined together and eachbeing ofhollow or chambered formation for housing suitable heat-retaininginsulation 6.A Formed in the top 'wall 4, is preferably a valve ordamper controlled air and vapor vent 7.

Hinged to the top wall 4 at its forward margin, as at 8, for swingablyclosing the front end of the oven, is a door 9 adapted `when closed tonormally flatwise abut at its margin in heat-retaining relation againstthe front ends of the top, side, and bottom walls of the oven.Frequentlyunder the intenso heat of the oven or fromv other causes, thelnormal tight closing relation between the door 9 and the several wallsof the ove-.1 proper is affected, in which event separate angle-members10, 111l, and 12 disposed at and vhaving slot and pin and nut connectionat one leg as at 13, with the front end portions of the top, side, andbottom walls, respectively, of the oven, are independently adjusted toprovide vat their other leg a fiat surface for engagement with themarginal portion of the door 9 to effect a heat retaining joint betweenthe oven and the door when the door is closed. And provided upon theinner face of the. door 9 to fit when 'the door is closed within theframe or enclosure formed by the several angles l0, 11, and 12, is ahollow compartment or cham- ,ber 14 also containing suitable insulation6 for increasing heat retention by the door 9 when closed.

'Suitably' supported transversely upon the rear wall 5 of the oven, isan aligning pair ,pipes 15 in'suitably spaced relation and presentedtowards the oven, are outlet pipe-sections 18, the bores of which areeach partl)T reduced, as at 19, forming substantially closingvalve-seats for needle-valve members 20 seated for individualmanipulation in the respective pipe-sections 18 for selectivelycontrolling and regulating the flow of Igas from the pi es y15 to theseveral sections 18.

Disposed longitudinally in spaced relation within the oven and upon itslower or bottom wall 2, are burner-pipes 21 capped or otherwisepreferably permanently closed at their forward end, as at 22, and eachformed Within the oven with a longitudinal series of 4upwardly presentedjet-orices 23. The

several pipes 21 align with lthe several'respective pipe-sections '18and attheirV 'rear ends project exteriorly of the oven for supportingmixin v-chambers 24, which latter at their end-wa s 25 have threadedengagement with the respective ipe-sections 18, as best seen in Figure7. T 1e end walls l25 of the several mixing-chambers '24 are formed withsuitable cut-outs to provide air-entrance openings or inlets, 26,anddisposed for threaded movement upon the several respectivepipe-sections 18 for adjustably o ening and closing the a ertures 26,are dlsk-valves 27. I might 1ere state that, while not specificallyshown, the Vopenings in the oven end-wall `5 for the severalburner-pipes 21 are by means'of gaskets or l the like made gas-tight.V

Disposed lengthwise and preferably loosely for removal and replacementWithin the oven, is a series of suitably elongated substantiall invertedchannel-shaped plates or so-calle burner-boxes 28 that rest at theirangesor side walls upon the bottom wall 2 of the oven and bridge theseveral burner-pipes 21, as best seen in Figure 2,

each plate or box 28 being preferably strengthened intermediate its sideflanges by a supporting longitudinal wall 29 that di-V vides its channelinto substantially a pair of burner-pipe compartments. r

In use and operation, the several plates 28 perform the function, as itmay be said, of a false removable oven bottom, are heated directlywithout loss ofl heat by the burning or ignited gas iowing from thejetorifices 23 of the several pipes 21, and are thus adapted to supportthe work within the made and substituted for those herein shown ovensubstantially directl over, yet without impingement thereupon y, thegas-flames. The oven proper is also substantially gas or vapor tight andthrough its novel construcand described without departing from the inature and principle of my invention.

Having thus described my invention, what I c aim and desirevto secure byLetters lPatent is:

41. A heat-treating oven comprising a di-s osed lon itudinally `inspaced-relatlon w-it in' the c amber and upon the bottom wall of theshell, and 'a series of work-supporting plates disposed within the shellover..`

bottomvwall thereof, and a series of burnerpipes disposed upon thebottom wall ofthe shell and within the channels of the plates.

shell, a; series of perforated burner pipes .l

3. A heat-treating oven comprising a shell, a series of invertedwork-supporting channel-shaped plates disposed within the shell andresting at their anges upon the bottom wall thereof, a series of burnerpipes disposed upon the bottom wall of the shell and within the channelsof the plates, and

means for individually controlling the low of combustible iiuid into theseveral pipes.

4. A heat-treating oven comprising con-4 nected top, bottom, .and sidewalls, a door hinged to the oven for closing an end thereof, andangle-members disposed upon said walls for forming a kheat-retainingjoint with the door when the door is closed.

5. A'heat-treating oven comprising connected top, bottom, and sidewalls, a door hinged to the ovenv for yclosing an end thereof, andangle-members adjustably disposed upon said walls for forming aheat-retaining joint -with the door closed. v

6. A heat-treating oven comprising a shell, a plurality of separateinverted worksupporting channel-shaped plates disposed in a lon itudinalseries within the shell and removaly resting upon the bottom wallthereof, and aseries of burner pipes disposed upon the bottom wall ofthe shell andA within the channels of the plates.

In testimony whereof, I have signed my name to this specification. y

' f WILLIAM E. PATCH.

when the door is

